CA1176312A - Tone detector circuit - Google Patents

Tone detector circuit

Info

Publication number
CA1176312A
CA1176312A CA000392870A CA392870A CA1176312A CA 1176312 A CA1176312 A CA 1176312A CA 000392870 A CA000392870 A CA 000392870A CA 392870 A CA392870 A CA 392870A CA 1176312 A CA1176312 A CA 1176312A
Authority
CA
Canada
Prior art keywords
coupled
output
signal
comparator
response
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000392870A
Other languages
English (en)
French (fr)
Inventor
Lawrence M. Ecklund
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of CA1176312A publication Critical patent/CA1176312A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
    • H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
    • H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
    • H04H20/49—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for AM stereophonic broadcast systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Circuits Of Receivers In General (AREA)
CA000392870A 1980-12-22 1981-12-21 Tone detector circuit Expired CA1176312A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/218,878 1980-12-22
US06/218,878 US4405837A (en) 1980-12-22 1980-12-22 Tone detector circuit

Publications (1)

Publication Number Publication Date
CA1176312A true CA1176312A (en) 1984-10-16

Family

ID=22816861

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000392870A Expired CA1176312A (en) 1980-12-22 1981-12-21 Tone detector circuit

Country Status (9)

Country Link
US (1) US4405837A (ko)
EP (1) EP0066624B1 (ko)
JP (1) JPH0570337B2 (ko)
KR (1) KR880001291B1 (ko)
AU (1) AU543433B2 (ko)
BR (1) BR8108927A (ko)
CA (1) CA1176312A (ko)
IT (1) IT1172184B (ko)
WO (1) WO1982002304A1 (ko)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4503397A (en) * 1982-06-17 1985-03-05 General Motors Corporation AM Stereo pilot signal detection circuitry
US4944011A (en) * 1987-08-21 1990-07-24 Motorola, Inc. Circuit for controlling operator indicators in an AM stereo receiver
US5392347A (en) * 1992-02-19 1995-02-21 Nec Corporation Ringing tone signal detecting circuit
US5809085A (en) * 1995-06-28 1998-09-15 Motorola Inc. Apparatus and method for detecting and discriminating various signal types in the presence of impulse distortions
US6771712B2 (en) * 2001-07-27 2004-08-03 The Pulsar Network, Inc. System for extracting a clock signal and a digital data signal from a modulated carrier signal in a receiver
US8379838B2 (en) * 2007-06-05 2013-02-19 Skyworks Solutions, Inc. Tone detector

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3558911A (en) * 1969-05-29 1971-01-26 Gen Electric Underfrequency relay
US3717818A (en) * 1972-01-10 1973-02-20 J Herbst Instantaneous voltage detector
US3944749A (en) * 1972-05-10 1976-03-16 Kahn Leonard R Compatible AM stereophonic receivers involving sideband separation at IF frequency
GB1384336A (en) * 1972-11-03 1975-02-19 Itt Creed Telegraphic receiving apparatus
US3792290A (en) * 1973-02-20 1974-02-12 Motorola Inc Tone detector with constant detection response time
DE2416601C3 (de) * 1974-04-05 1980-06-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren und Schaltungsanordnung zum Empfang und zur Ausweitung empfangener Fernbedienungssignale
US4031463A (en) * 1976-03-01 1977-06-21 Control Data Corporation Power brown-out detector
US4066848A (en) * 1976-09-07 1978-01-03 T.A.D. Telephone ring detector circuit
US4139851A (en) * 1976-11-22 1979-02-13 Rca Corporation Two level threshold circuit
US4159398A (en) * 1977-09-27 1979-06-26 Motorola, Inc. Stereo presence signal for an AM stereo system
GB2020132B (en) * 1978-03-17 1982-06-03 Post Office Arrangement for monitoring the performance of a digital transmission system
US4216463A (en) * 1978-08-10 1980-08-05 Motorola, Inc. Programmable digital tone detector

Also Published As

Publication number Publication date
EP0066624A4 (en) 1983-07-04
AU543433B2 (en) 1985-04-18
WO1982002304A1 (en) 1982-07-08
KR830008572A (ko) 1983-12-10
IT1172184B (it) 1987-06-18
EP0066624B1 (en) 1986-06-11
KR880001291B1 (ko) 1988-07-18
AU8007082A (en) 1982-07-20
BR8108927A (pt) 1982-11-30
JPH0570337B2 (ko) 1993-10-04
IT8149970A0 (it) 1981-12-21
EP0066624A1 (en) 1982-12-15
JPS57502035A (ko) 1982-11-11
US4405837A (en) 1983-09-20

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Legal Events

Date Code Title Description
MKEC Expiry (correction)
MKEX Expiry
MKEX Expiry

Effective date: 20011221